Interesting assessments. "Secretive" perhaps, but "silent" might be more accurate. This "don't ask, don't tell" characteristic was not unique to German immigrants exclusively; much the same could be said for many other groups who pulled up stakes from their native soil to take up new starts in foreign lands. It may seem more pronounced amongst our German ancestors since many of the Deutsch are rather business-like, and less openly glib, by comparison to say most Brits or Yanks [cites self as proof]. To this day Germans tend to be hard working, "no-nonsense" types, and this is found across most of the German landscape. If you travel through Europe you can't help but notice how the Deutsch tend to be a tad more formal and reserved than many of their neighbors (look to Italy or France for instant contrasts), though exceptions will always apply when painting in broad strokes.
Still, this could probably be called a traditional Germanic trait, from a land that has mastered education and science, the arts and warfare, as well as any. The Bavarians to the south probably present the best counter-image, with more jovial dispositions on the whole (probably due to the warmer climate found there lol). Then again, perhaps I'm erring by oversimplifying things.
It should be remembered that while places like America and Canada have certainly presented attractive destinations for emigrants to "better their lives," just as many Germans left their native soil reluctantly as those who came in open embraces. I need look no further than at my own ancestors for evidence of this. The matriarch of our clan longed, till the day she died, to be back in her native community of Hildesheim. She never fully adjusted to the cultural upheaval the settling into America presented, and never forgave her husband for their departure (and here, she ran a German Institute for classical studies in early California, and certainly could not be called a child of deprivation in her newly adopted country). Sadly the family patriarch had little choice in the matter. For other families and individuals, just the opposite would have been the case. America must have seemed like a big breath of fresh air!
It's a given that a degree of desperation was one of the driving forces that allowed many to depart the Fatherland without looking back. Germany was - and has been for much of the modern era - a highly overcrowded area. The population has burgeoned in recent centuries (much like Japan in the East), and as a whole those nations possess only limited natural resources and land expanses to sustain their growing populations. It is not a reach to see the alleviation of these conditions as being one of the chief motivations amongst some of their leaders, to include the use of military power if necessary. Understandably it has been a concern of their neighbors that they have proven capable of using aggrandizement and the use arms quite proficiently at times - but then again, this is the tumultuous story of Europe and the West, dating back in like fashion to the Greeks, Romans and Celts, and the eventual arrival of the Germanic peoples as nation and empire builders in their own right. Unlike their cousins on the British Isles, no convenient seaports (or traditional naval masteries for that matter) present themselves to allow for colonial based solutions to such things, as was the rage in eras gone by.
We in the States have had it a lot easier in this regard. The Indian population simply stood no chance against the repeated drives and encroachments of our Anglo forbears who were looking to forge new homesteads in the virgin lands they found before them. When difficulties arose beyond what the homesteaders could take care of on their own, the US Army would invariably appear on the scene to smooth things over, often in unforgiving fashion. In taking the soil of North America for our own, we created an amazingly prosperous empire, one that barrels forth - not imperfectly - to this day. Only in our case, we had an abundant and undeveloped land mass to play with (unheard of in Europe), most of it rich in natural resources. We were thus in position to entice - even solicit - others to come over and get in on the spoils while they lasted. Obviously many did, with the Germans - noted for their work ethic and above-average educations and specialty skills - being welcomed as openly as any group.
Now that prefaced, I'd be careful in characterizing our forbears as being overly "secretive," unless it is in the "seeming" sense. There certainly has been a degree of anti-German sentiment during the periods of the two world wars which contributed to the downplaying of one's German ancestry at times. And I'm sure there were also some immigrants who carried distinctly anti-Prussian biases from earlier periods, likely peaking when Bismarck was hammering together a new and united Germany, and using the threat of arms to compliment his �ber-diplomacy skills. But probably most of what appears to be secretive can be attributed to the inevitable (and often difficult) turning of one's back to the past, which demands the letting go of old customs and familiar cultural icons - including one's given language - in the name of "getting on with things" in a new and foreign place. That can't be easy, especially when there is no turning back. The farmers who migrated to the rural expanses, being more isolated in "localized" communities, probably felt this impact less than those thrust into big city environs.
While we generally like to paint or imagine a rosy picture of this transformation, it wasn't always a thing of beauty. Jobs, often menial, had to be sought without delay -- there were few safety nets like we have in place today. This required the acquisition of a new language, if even rudimentarily, and not all who came possessed high skill or craft levels (though surprisingly many did). Many got by on only the most meager of circumstances, in quiet desperation (to borrow from Thoreau), like so many other emigrants. Suicide rates have always been high amongst transient classes and the displaced, German immigrants notwithstanding. The miracle is that so many made it, and made it well. The stories of those who assimilated successfully - and prosperously - could fill volumes to no end. In this new and developing nation, the opportunities were indeed sky high.
Today the Germans make up the largest identifiable group within the American populace, but the transition from German to American was not seamless or without hitches. Those early emigrant ancestors of ours worked HARD to make it in this country, as they did everywhere else they settled. As I see it, that somewhat silent nature we often glimpsed (or heard of) from those who came before us had more to do with the embrace of this barrage of changes than it did with carrying secrets, or sullenness, from the past. Couple this with what I mentioned earlier, the traditionally sturdy, reserved, even rigid Germanic bearing. Let's not lose sight of the fact that few of our ancestors had the time or luxury to pursue things like the family histories we now enjoy stitching together, or felt the need to look back over their shoulders, as most were too busy trying to make it day to day in the new world.
A bit long but .. Jb